Microstructure evolutions and deformation mechanisms of a Ni-based GH3536 Superalloy during loading at 293 K and 77 K

doi:10.1016/j.matchar.2023.113422

IMR OpenIR

	Microstructure evolutions and deformation mechanisms of a Ni-based GH3536 Superalloy during loading at 293 K and 77 K
	Wang, Yong-Qiang 1,2; Yuan, Chao 2; Zhang, Bing 1,2; Gao, Xin-Yu 1,2; Qiao, Shi-Chang 1,2; Wen, Xin 1,2; Chen, Yi-Peng 1,2; Wang, Feng-Zhen 1,2
通讯作者	Yuan, Chao(ychao@imr.ac.cn)
	2023-12-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	206 页码:13
摘要	In this study, tensile tests and interrupted experiments at different true strain levels were performed at 293 K and 77 K to reveal the deformation mechanisms of GH3536 superalloy during loading. The microstructure evolutions of the alloy with strain at both temperature were studied via Transmission electron microscopy (TEM), and dislocation densities were calculated by X-ray diffraction (XRD) for quantifying the forest hardening contribution to the flow stress. Deformation twins were rarely observed in the GH3536 superalloy specimens deformed at 293 K, where deformation occurred solely by dislocation slip. While twinning was initially found at a strain of similar to 7% at 77 K, and the corresponding stress at which twinning occurs is 808 +/- 46 MPa. The twin volume fractions, their widths and spacings were determined by electron backscatter diffraction (EBSD), which is used to investigate the twin evolution of GH3536 alloy at 77 K. The deformation mechanisms of GH3536 alloy, as well as its twinning behaviors, depend on the competition between the maximum flow stress and critical stress for twinning. The maximum flow stress is large enough to activate twinning at cryogenic temperature, resulting in the transition of deformation mechanisms for GH3536 alloy as SLIP (dislocation slip) at 293 K and TWIP+SLIP (deformation twinning and dislocation slip) at 77 K, and the improved combination of ductility and strength at 77 K compared to 293 K is derived from additional deformation mode provided by twinning during the process of deformation.
关键词	Nickel -based superalloys Mechanical properties Deformation mechanism Microstructure Twinning
DOI	10.1016/j.matchar.2023.113422
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:001110022900001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177307
专题	中国科学院金属研究所
通讯作者	Yuan, Chao
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Wang, Yong-Qiang,Yuan, Chao,Zhang, Bing,et al. Microstructure evolutions and deformation mechanisms of a Ni-based GH3536 Superalloy during loading at 293 K and 77 K[J]. MATERIALS CHARACTERIZATION,2023,206:13.
APA	Wang, Yong-Qiang.,Yuan, Chao.,Zhang, Bing.,Gao, Xin-Yu.,Qiao, Shi-Chang.,...&Wang, Feng-Zhen.(2023).Microstructure evolutions and deformation mechanisms of a Ni-based GH3536 Superalloy during loading at 293 K and 77 K.MATERIALS CHARACTERIZATION,206,13.
MLA	Wang, Yong-Qiang,et al."Microstructure evolutions and deformation mechanisms of a Ni-based GH3536 Superalloy during loading at 293 K and 77 K".MATERIALS CHARACTERIZATION 206(2023):13.